Street-sweeping machine.



J. A. SCHROEDER. STREET SWEEPING MACHINE.

APPLICATION FILED AUG. 16, me.

Patented Apr. 3, 1917.

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STREET SWEEPING MACHINE.

APPLICATION FILED AUG. 16. l9|6.

Patented Apr. 3, 1917.

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1. A. SCHROEDER.

STREET SWEEPIN-G MACHINE.

APPLICATION FILED AUG. 15, 1916. 1 Patented Apr. 3,1917.

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JACOB A. SCI-IROEDEB, 0F PIQUA, OHIO, ASSIGNOR TO THE MUNICIPAL IVIAOHINE MANUFACTURING COMPANY, OF PIQUA, OHIO.

STREET-SWEEPING MACHINE.

Specification of Letters Patent.

Patented Apr. 3, 1917..

Application filed August 16, 1916. Serial No. 115,129.

To all whom it may concern:

Be it known that I, JACOB A. SoHnonDnR, a citizen of the United States, residing at Piqua, in the county of Miami and State of Ohio, have invented certain new and useful Improvements in Street-Sweeping Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in street -sweeping machines and comprises various structural improvements as well as functional of the street-sweeping machine shown and described in my pending application, Serial No. 102,902, filed June 10, 1916. The object of the invention is to increase the efliciency and effectiveness of the broom-operating mechanism as well as the lightness of the machine and its capacity for doing the work thoroughly.

In the accompanying drawings, Figure 1 is a top plan view of the frame with the ends thereof eliminated, and the broom-operating mechanism, the carrying wheels, dirt conveyers, hoods, etc., are also eliminated as these parts are not involved in the invention and their presence would tend to interfere with the illustration of the parts involved in the invention; Fig. 2 is a side elevation of the broom-operating mechanism; Fig. 3 is an enlarged section on the line 3-3 of Fig. 2; Fig. 4 is a modification of the means for elevating the broom as it arrives at its central or upright position in the cycle of its movement; Fig. 5 is an enlarged section on the line 5-5 of Fig. 4:.

In a detail description of my invention, similar reference characters indicate the same parts in the several views.

The chassis or frame-work of the machine is constructed of metallic angle bars 1 -1 and transverse angle bars 22 united. On each side of the frame are rigidly mounted the broom frames consisting of posts 33 which incline toward each other and are united at their upper ends by blocks or plates 4tt which firmly hold said upper ends together in the form of frames, the lower ends of which are firmly supported on the frame pieces 11. The interposed blocks or plates 4-4 of each frame are united by a tie rod 5 so that the two frames are tied together at their upper ends, the tie rod being in the form of a long bolt fitted on one end with tightening nuts 7. Pivoted to each of the blocks 1 1 is an anti-friction roller 6 to be again referred to. 8 designates the broom which is substantially wider than the frame of the machine. The structure of the broom includes a back 8 to which is attached, near the ends thereof, two metallic channel bars 9-9, the channel sides of said bars being inwardly and facing each other. The upper ends of said channel bars 99 are united by a transverse bar 10. The anti-friction rollers 6, before referred to, enter the channels of the bars 99 and serve to hold the upper ends of said bars on a fixed pivot as the bars and therewith the broom oscillate back and forth in the sweeping operations. Rigidly attached to the opposite sides of the frame of the machine are two castings 11 which have endless channels 12 lying or facing outwardly. Movable in alinement with each of these channels 12 is a sprocket chain 13 which passes around sprocket wheels 14 and 15 the former of which are the driving wheels for said chains. The sprocket wheels 14: are on a common shaft 16 which is connected with a driving shaft 17 by sprocket wheels 30 and 18 and chain 11. The shaft 17 carries a friction disk 19 which is engaged during its operation by friction disk 20 on a main drive shaft 21. One of the bearings, to-wit, 22, of said shaft 21, has a cam surface 23 which is operated upon by a shifting collar 24 loose on the shaft 21 between the disk 20 and the cam surface 23. The shifting collar 24: has a hand lever 25 by means of which said collar is operated to throw the disk 20 in and out of contact with the disk 19. The shaft 21 is driven by an engine shafi 26 through sprocket chain 27 which passes around sprocket wheels 28 on the respective shafts 21 and 26. It will thus be seen how the broom-propelling chains '13 are driven. A pin 29 of each chain 13 is extended on both sides thereof as is shown 1O 1 its forward movement over the surface being which is carried through its sweeping movement thereby. As shown in the drawings,

- especially Fig. 2, the broom is in its initial position from which position itmoves over the surface of the street until it comes approximately to the position shown by the broken inclined line A. At this point it is elevated by the rollers 31 traveling into and through the upper runs of the channels 12. It will be apparent that as the broom in swept approaches the central position the pins 29 must necessarily be gradually elevated to compensate for the varying angularity of the bars 9. This is accomplished by providing two idle sprocket wheels 84: mounted upon pivots 35 suitably supported in the castings 11. The sprocket wheels 8i arein positions to engage the lower portions of the chains 13 atcentral points and the position of the wheels 34 are such that the stated, form fixed pivots for the bars 99.

Other means may be employed to compensate for the varying angnlarity of the bars 99; see Figs. 4 and 5. In this modified form, the chain wheels 3434 and the shaft are. dispensed with and instead thereof the 1 lower portions of the bars or broom frame 99 are provided with oblong slots 26 through which pass the pinsv 29 projecting from the sprocket chains 13. Attached to each pin outside of the nut thereon is a compression spring 37 which also has an attachment with the bar 9 on each side by a means of a lugor bracket 88. The springs 37 maintain the broom in contact with the surface being swept. In this form of mechanism for enabling the broom frame to rise as 'it reaches a perpendicular position,.the fixed shoulder 33 is omitted and instead thereof an anti-friction roller 39 and washer 40 are employed asa means cooperating with 1 the nut-32 for connecting the chains 13 with the broom frame.

Having described my invention, I claim.

1. In a street-sweeping machine, the combination with a suitable frame, of a broom, a frame upon which said broom is supported, sprocket chains connected to said frame and adapted to impart to the broom move ments in two horizontal planes one of which is its sweeping movement, means for guiding said chains in their travel, and means for driving said chains, substantially as described.

2. In a street-sweeping machine, the combination with a frame, of a broom, a frame.

supporting said broom having a pivotal and slidable connection with said frame, channel guides mounted on said frame, sprocket chains connected to said broomframe, sprocket wheels for operating said chains, and rollers connected to said chains at the point of their connections with the broomframe, said rollers bein adapted to travel in the channel guides and to direct the movement of the broom, substantially as described.

3. In a street-sweeping machine, the combination with a frame, of a broom, an oscillating frame to which said broom is connected, sprocket chains to which said broomframe is connected and by means of which a reciprocating movement is imparted to said broom, and means whereby the broom is elevated as it approaches a perpendicular position in its sweeping movement.

4. Ina street-sweeping machine, the combination with a frame, of a broom approximately the width of said frame, an oscillating frame on which said broom is supported, chains connected with said broom-frame and actuating the same, sprocket wheels engaging said chains, and channel guides cooperating with the connections between the chains and the broom-frame in guiding said chains whereby the broom is given a reciprocating movement, and means for elevating the frame and the broom when the broom approaches a perpendicular position in its sweeping movement.

In testimony whereof I afiix my signature, in presence of two witnesses.

JACOB A. SGHROEDER.

lVitnesses MELLIE GALLowAY, MATTHEW SIEBLER.

Copiesof this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, D. G. 

